Hi Geert > > From: Kuninori Morimoto <kuninori.morimoto...@renesas.com> > > > > rcar_i2c_init() initializes I2C device, but it should be called > > *after* pm_runtime_get_sync(). Otherwise it outputs very hi speed > > clock. This patch solved this issue, > > This patch also removes pointless rcar_i2c_init() > > from rcar_i2c_probe() > > > > Signed-off-by: Kuninori Morimoto <kuninori.morimoto...@renesas.com> > > --- > > drivers/i2c/busses/i2c-rcar.c | 4 ++-- > > 1 file changed, 2 insertions(+), 2 deletions(-) > > > > diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c > > index 616433d..edbfefc 100644 > > --- a/drivers/i2c/busses/i2c-rcar.c > > +++ b/drivers/i2c/busses/i2c-rcar.c > > @@ -474,6 +474,8 @@ static int rcar_i2c_master_xfer(struct i2c_adapter > > *adap, > > > > pm_runtime_get_sync(dev); > > > > + rcar_i2c_init(priv); > > Hence now it's done again for every transfer? > > What about moving it just before the call to i2c_add_numbered_adapter(), > and wrapping it inside pm_runtime_get_sync(dev)/pm_runtime_put()?
In my experience, it should be called again for every transfer. Because SoC/IP might doesn't keep register setting value if you call pm_runtime_put() (I fought with this behavior when sh_mobile IP :P ) -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html